Commercial Pilot Airplane (CAX) Practice Exam 2025 – Complete Calculations Guide

The weight of fuel is calculated by multiplying the number of gallons of fuel by the weight of fuel per gallon. This method takes into account the specific density of the fuel, which determines how many pounds are in each gallon. For example, aviation gasoline typically weighs about 6 to 6.5 pounds per gallon, while jet fuel weighs around 6.7 to 7.2 pounds per gallon. Therefore, if you know the volume of fuel in gallons and the weight per gallon, you can accurately find the total weight of the fuel by applying the formula.

The other options do not correctly represent the relationship between volume and weight. Some suggest using incorrect formulas that either multiply or divide weight instead of utilizing the correct conversion between gallons and the specified weight per gallon. Understanding this correct calculation is essential for weight and balance considerations, which are crucial for safe flight operations.